Sun visor



FIG. 1 is a perspective view of a sun visor showing my new design; the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view, the right side being a mirror image thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a bottom plan view thereof.

The characteristic feature of my design resides in the central forehead portion of the visor, as best illustrated in FIG. 4. 

The ornamental design for a sun visor, as shown and described. 